Not a mystery at all. "Pro users" refers to radio stations, DJ’s etc where they use cartridges tracking at high tracking weights. The higher the tracking weight the less important antiskate is.
For home use the anti-skating must be set up equal to tracking force (less for advanced profiles). At least this is a basic recommendation, following this advice, if the tracking force is 2g then the anti-skating is about 2g too. If the tracking force is 1g then anti-skating is also about 1g. The higher the tracking force the higher the anti-skating? No?
For home use I’ve seen (and owned) only one tonearm without anti-skating, it was Schick "12 inch.
Why IKEDA removed the anti-skating from his PRO version of 64fx ?
The armlift also not there, it is a PRO tonearm for manual operation only.